From 371868d2e541833a0ffaa9357c79da7a97ee83be Mon Sep 17 00:00:00 2001
From: "ester.zhou" <ester.zhou@huawei.com>
Date: Fri, 10 Mar 2023 12:01:13 +0800
Subject: [PATCH] Update doc (15364) Signed-off-by: ester.zhou
 <ester.zhou@huawei.com>

---
 .../reference/arkui-ts/ts-methods-custom-dialog-box.md   | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/en/application-dev/reference/arkui-ts/ts-methods-custom-dialog-box.md b/en/application-dev/reference/arkui-ts/ts-methods-custom-dialog-box.md
index 37bf4de513..2aef524442 100644
--- a/en/application-dev/reference/arkui-ts/ts-methods-custom-dialog-box.md
+++ b/en/application-dev/reference/arkui-ts/ts-methods-custom-dialog-box.md
@@ -108,6 +108,11 @@ struct CustomDialogUser {
     customStyle: false
   })
 
+  aboutToDisappear() {
+    delete this.dialogController,
+    this.dialogController = undefined
+  }
+
   onCancel() {
     console.info('Callback when the first button is clicked')
   }
@@ -124,7 +129,9 @@ struct CustomDialogUser {
     Column() {
       Button(this.inputValue)
         .onClick(() => {
-          this.dialogController.open()
+          if (this.dialogController != undefined) {
+            this.dialogController.open()
+          }
         }).backgroundColor(0x317aff)
     }.width('100%').margin({ top: 5 })
   }
-- 
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